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US 8,149,954 B2Granted
Baseline wander compensation for perpendicular recording
AssigneeLink—A—Media Devices Corporation
InventorsMarcus Marrow, Shih-Ming Shih
Life of this patent
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Abstract
A tail estimate signal which includes noise associated with baseline wander is generated. The tail estimate signal is generated by processing an input signal using a detector to obtain one or more decisions. Using the one or more decisions, the tail estimate signal is generated. The tail estimate signal is removed from the input signal.
Claims18
A method, comprising:
- using a processor to generate a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions;
- removing the tail estimate signal from the input signal;
- and
- using a second detector to process the input signal with the tail estimate signal removed, wherein the detector used to obtain the one or more decisions has a faster latency than the second detector.
4 more elements
A method, comprising:
- using a processor to generate a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions, including by using the equation yi=βxi+αyi-1 where x are input samples and y are output samples;
- and
- removing the tail estimate signal from the input signal.
3 more elements
A method, comprising:
- using a processor to generate a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions, wherein the detector used to obtain the one or more decisions includes a decision feedback equalizer (DFE) having one or more delay element parameters, Ti;
- and
- generating the tail estimate signal using the one or more decisions, including by using the equation yi=βxi+αyi-1 where xi are input samples and yi are output samples and β and α are parameters;
- removing the tail estimate signal from the input signal;
- and
- simultaneously determining values for at least the parameter β and the one or more delay element parameters, Ti.
4 more elements
A system, comprising:
- a tail estimator configured to generate a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions;
- a tail remover configured to remove the tail estimate signal from the input signal;
- and
- a second detector configured to process the input signal with the tail estimate signal removed, wherein the detector used to obtain the one or more decisions has a faster latency than the second detector.
4 more elements
A system, comprising:
- a tail estimator configured to generate a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions, including by using the equation yi=βxi+αyi-1 where x are input samples and y are output samples;
- and
- a tail remover configured to remove the tail estimate signal from the input signal.
3 more elements
A system, comprising:
- a tail estimator configured to generate a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions, including by using the equation yiβxi+αyi-1 where xi are input samples and yi are output samples and β and α are parameters;
- a tail remover configured to remove the tail estimate signal from the input signal;
- and
- a processor configured to simultaneously determine values for at least the parameter β and the one or more delay element parameters, Ti.
4 more elements
A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- generating a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions;
- removing the tail estimate signal from the input signal;
- and
- using a second detector to process the input signal with the tail estimate signal removed, wherein the detector used to obtain the one or more decisions has a faster latency than the second detector.
4 more elements
A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- generating a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions, including by using the equation yi=βxi+αyi-1 where x are input samples and y are output samples;
- and
- removing the tail estimate signal from the input signal.
3 more elements
A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- generating a tail estimate signal which includes noise associated with baseline wander, including by:
- processing an input signal using a detector to obtain one or more decisions;
- and
- generating the tail estimate signal using the one or more decisions, including by using the equation yi=βxi+αyi-1 where xi are input samples and yi are output samples and β and α are parameters;
- removing the tail estimate signal from the input signal;
- and
- simultaneously determining values for at least the parameter β and the one or more delay element parameters, Ti.
4 more elements
Dependencies are inferred from the claim text.